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On Fri, May 31, 2019 at 01:32:56PM +0300, Ivan Kardykov wrote:
> Hi,
>
> I want to share results of our (tabit-pro) work with Qubes project
> qwt-crossbuild [1].
>
> It's an alternative qubes windows tools build environment that we are
> going to support for our local project.
>
> Main goals:
> -- get rid of closed source tooling in the build process
> -- provide build reproducibility
> -- catch and fix the most disturbing bugs
> -- extend QWT functionality (windows 10 support at least)
>
> At the moment IMO at least one PR (qga cpu usage, related issue [2])
> could be made easily to the upstream. I'm not sure about others. For
> example, providing mingw support or changing installation process in the
> upstream would be too invasive and expensive. But we could try to
> schedule that work if anyone else is interested or make alternative
> community package (looks easier).
Thanks for sharing! In fact I've already noticed it and got inspired a
little[3].
On the other hand, we've tried that before and have bad experience with
building MinGW, especially for building drivers. I see you've also
noticed some stuff missing (libraries, headers, exception support,
inf2cat tool). Anyway, since you succeeded at building all of it, I
think it's worth a try.
Cross-compiling from Linux would be _much_ more convenient than building
on Windows, and hopefully will allow plugging QWT build into automated
build infrastructure.
Creating a qubes-builder plugin for that isn't that hard. I have some
more or less working prototype already. Adopting sources to build with a
different compiler is some more work, but looks to involve mostly
rearranging header files (like, naming them with lowercase). Basically
what you've done in prep.sh, but by applying it properly to the source
code (using #ifdef __MINGW32__ when really necessary).
After making it build at all, the next step would be to apply actual
improvements. And review/fix all the compiler warnings - there is quite
a lot of them, but given previous experience with mingw, one needs to
be careful - some may actually be bugs in mingw header files, not
necessary our code.
> [1] https://github.com/tabit-pro/qwt-crossbuild
> [2] https://github.com/QubesOS/qubes-issues/issues/3418
[3] https://github.com/QubesOS/qubes-issues/issues/5065
- --
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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